401394 has 32 divisors (see below), whose sum is σ = 967680. Its totient is φ = 108432.

The previous prime is 401393. The next prime is 401407. The reversal of 401394 is 493104.

It is a super-2 number, since 2×401394² = 322234286472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 401394.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 401394.

It is not an unprimeable number, because it can be changed into a prime (401393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547 + ... + 1049.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2⁴⁰¹³⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483840).

401394 is an abundant number, since it is smaller than the sum of its proper divisors (566286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401394 is a wasteful number, since it uses less digits than its factorization.

401394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 401394 is about 633.5566273034. The cubic root of 401394 is about 73.7661230669.

Adding to 401394 its reverse (493104), we get a palindrome (894498).

The spelling of 401394 in words is "four hundred one thousand, three hundred ninety-four".